Depends on the definition of PG. Steve Kerr is 1st in 3pt percentage career, B.J. Armstrong is 6th, Craig Hodges is 25th, one spot ahead of Peja. Derek Fisher was streaky enough to score the record for treys made in a playoff series (15 for 20 vs SA, 2001) and he's 8th all time in total playoff treys made.
None of those guys was actually the PG in his system though w/ Pippen, Harper, Bryant or Jordan actually running the offense. Dre would fit this mold.